Are you running linuxptp to manage the clock or letting it free-run? I have 
some ptp servers, but have been focused on testing ntp with chrony managing the 


> On Apr 11, 2017, at 11:56, Miroslav Lichvar <> wrote:
> I've synchronised the system clock to the PHC with
> "phc2sys -s eth0 -m -q -O 0 -N 25 -R 20", configured chronyd to not
> adjust the system clock (noselect), and printed in chronyd the raw
> PHC-sys offset and delay for each PHC reading.

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